Comment: The Lezghi form needs a special comment. It is, in fact, a historical plural form: n-er < *ʔin-er < *ʔil-er (cf. dialectal Khl. iler 'nose'); the shift from l to n in lit. Lezghi is not quite clear, but paralleled in the case n-ez "eat" < *ʔil-ez (see *ʔiʔʷäl-). In its turn, *ʔil-er is a quite regular reflex of *muʔel-ar ("the nostrils") with a normal loss of the preaccented sequence *mu-.
The word belongs to the 3d class in Kryz., Bud. and Arch.